Effect of Temperature and Freeze-thaw Cycles on Soil-water Characteristics Curve of Coastal Saline Soil
In order to explore the effects of environmental temperature and freeze-thaw cycles on the water retention characteristics of coastal saline soil,taking coastal saline soil in Huanghua area as the research object,the matric suction,osmotic suction and total suction soil-water characteristic curves of each sample under differ-ent environmental temperature and freeze-thaw cycles were measured by filter paper method,and the change laws of soil-water characteristic curves and water retention characteristics of saline soil under different factors were an-alyzed.The experimental results were fitted and analyzed by Van Genuchten(VG)model.The results show that with the increase of environmental temperature and the number of freeze-thaw cycles,the water retention perform-ance of the saline soil decreases.The influence of freeze-thaw cycles on the water retention characteristics de-creases with the increase of the number of freeze-thaw cycles.The VG model has a good fit for soil-water charac-teristic curve of coastal saline soil.According to the experimental results and fitting results,soil-water character-istic curve models were established respectively considering the environmental temperature and the number of freeze-thaw cycles,which can provide reference for engineering construction in coastal saline soil area.
coastal saline soilambient temperaturefreeze-thaw cyclesoil-water characteristic curveVan Genuchten model
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